Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 49: Ultrashort laser pulses: Generation II
Q 49.3: Talk
Thursday, March 21, 2013, 11:45–12:00, F 142
High-order harmonic generation in laser-induced plasma plumes at 1 kHz repetition rate — •Jiaan Zheng1, Michael Wöstmann1, Henrik Witte1, Helmut Zacharias1, and Rashid A. Ganeev2 — 1Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str.10, 48149 Münster, Germany — 2Institute of Ion, Plasma, and Laser Technologies, Academy of Sciences of Uzbekistan, Akademgorodok 33, Dormon Yoli Street, Tashkent 100125, Uzbekistan
High-order harmonic generation (HHG) of ultra-short laser pulses in laser-induced plasmas for generation of extreme ultraviolet radiation is reported. Laser-generated silver and tin plasma plumes are produced by an amplified Ti:sapphire laser system, which provides pulse energies up to 5 mJ at a duration of 35fs and 1 kHz repetition rate. The HHG output is characterized with regard to the target design, the pre-pulse energy and pre-pulse duration. The time delay between the pre-pulse for plasma generation and the main pulse for efficient HHG was optimized. Influences of a main pulse chirp and an additional second harmonic field in the main pulse on the HHG spectra are studied.